* {
  margin: 0;
  padding: 0;
}
ul,
li {
  list-style: none;
}
.container {
  width: 1423px;
  margin: 0 auto;
  background-color: rgb(247, 247, 247);
}
.header {
  width: 1200px;
  height: 100px;
  margin: 0 auto;
}
.header > img {
  margin-top: 15px;
}
.header_right {
  float: right;
  /* width: 220px; */
  height: 75px;
  margin-right: 5px;
}
.header_right > ul::after {
  display: block;
  content: "";
  clear: both;
}
.header_right > ul > li {
  float: left;
  font-size: 12px;
  padding-left: 8px;
  padding-right: 8px;
  border-left: 1px solid #fff;
  border-right: 1px solid #cecece;
  margin-top: 10px;
  margin-bottom: 20px;
}
.header_right > ul > li:nth-child(1) {
  border-left-color: transparent;
}
.header_right > ul > li:nth-child(4) {
  border-right-color: transparent;
}
.header_right > div {
  width: 100%;
  height: 32px;
  background-color: rgb(238, 238, 238);
  border-radius: 5px;
}
.header_right > div > input {
  margin-top: 8px;
  margin-left: 8px;
  background-color: rgb(238, 238, 238);
  border-color: transparent;
}
.header_right > div > input:focus {
  outline: none;
}
.header_right > div > input::placeholder {
  font-size: 10px;
}
span {
  color: #fff;
  display: block;
  float: right;
  margin-top: 8px;
  margin-right: 12px;
}
.nav {
  width: 100%;
  height: 40px;
  background-color: rgb(1, 90, 170);
  border-top: 1px solid #fff;
  border-bottom: 1px solid #fff;
}
.nav ul {
  margin-left: 112px;
  padding: 12px 0;
}
.nav > ul > li {
  float: left;
  width: 124px;
  height: 16px;
  color: #fff;
  font-size: 14px;
  text-align: center;
  border-left: 1px solid #cecece;
  border-right: 1px solid #000;
}
.nav > ul > li:nth-child(1) {
  border-left-color: transparent;
}
.nav > ul > li:nth-child(7) {
  border-right-color: transparent;
}
.content {
  width: 100%;
  height: 366px;
  background-image: url(../../img/day4/images/backgroud.jpg);
}
.content > div {
  width: 1200px;
  margin: 0 auto;
  border: 2px solid #cecece;
}
